The Mandela effect is the pseudoscientific belief that some differences between one's memories and the real world are caused by changes to past events in the timeline. Many Mandela effect believers believe it is caused by accidental travel between alternate universes.It was named after Nelson Mandela, whom some people erroneously believed to have died in prison in the 1980s. Another common false memory is thinking the title of the children's book series The Berenstain BearsWikipedia's W.svg is spelled as The Berenstein Bears.[1][2]The Mandela effect has not been explored by mainstream, peer-reviewed publications, and the claim that some false memories are caused by parallel dimensions going berserk is, shall we say, difficult to falsify.